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R-25 308/ar-10 lower?

Re: R-25 308/ar-10 lower?

Badshot is correct. They are not the same. The Armalite has a flat cut out in the rear for their Upper.

The DPMS/Knights/CMMG's have a round shape like a normal AR 15.

A Armalite upper will fit on the DPMS style lower however with a large gap in the rear.

Donald